UV power meter

C9536/H9535 SERIES

The C9536/H9535 series are UV power meters that directly measure UV light at specific wavelengths. The H9535 (sensor head) uses a UV sensor (phototube) that ensures stable UV measurement over a long period of operation and is calibrated in combination with the C9536 (controller) based on national standards. The detachable sensor head contains a rechargeable battery for UV detection and data memory, allowing remote measurement such as on a belt conveyor or in locations where cable routing is difficult. In addition to external control via the RS-232C interface, an analog control is available for recording on a data recorder, etc.


  • Absolute optical power monitoring (mW/cm2)
    Sensitivity-calibrated data at each wavelength (172 nm, 222 nm, 185 nm, 254 nm) is supplied with the power meter. We also append a Certificate of Calibration.
  • Detachable sensor head / remote measurement
    The detachable sensor head allows remote measurement on a conveyer belt of UV oven, etc.
  • Thin, flat sensor head: 14 mm thickness
    Allows the sensor head to be used closer to a light source.
  • External control: RS-232C
    The main unit has RS-232C interface for external control.
  • Stable performance at deep UV since no optical filters are used
    Specific UV light can be directly detected without any optical filter.
  • Wide light incident angle
    Acceptable light incident angle is close to cos θ, even without using diffusers.


  • Excimer lamp monitoring
  • Low pressure mercury lamp monitoring
  • UV light monitor
    ・ UV furnace (coating, adhesive, printing) ・UV cleaning, UV sterilization ・Improving surface characteristics


Controller: C9536

Display Liquid crystal digital display [irradiance (mW/cm2) / integrated optical power (mJ/cm2): Max.effective 4 digits]
Function Real time / Integration / Peak hold / Temperature
Integration time setting 1 s to 5 min (1 s step)
Analog output 0 V to +2 V
External interface RS-232C
Power requirement Rechargeable battery (built-in) / AC adapter (AC100 V to 240 V) (supplied)
Operating ambient temperature / humidity 0 °C to +40 °C / Below 80 % (no condensation)
Storage temperature / humidity -20 °C to +50 °C / Below 80 % (no condensation)
Weight Approx. 285 g

Sensor head : H9535 series

  H9535-172 H9535-222 H9535-185 H9535-254 Unit
Calibrated wavelength 172 222 185 254 nm
Applicable light source Excimer lamp Low-pressure mercury lamp -
Sensitive area φ6 mm
Optical power measurement range 0.001 to 200 mW/cm2
National standard NIST AIST NIST AIST -
Operating ambient temperature / humidity 0 °C to +60 °C / Below 80 % (no condensation) -
Storage temperature / humidity -20 °C to +60 °C / Below 80 % (no condensation) -
Weight Sensor head: Approx. 60 g / Cable: Approx. 110 g -

C9536 and H9535 series are not available to vacuum operation.

Sensor characteristics

H9535-172, -185 Spectral response

H9535-222 Spectral response

H9535-254 Spectral response

Augular response

Dimensional outlines (Unit mm)

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